Open Inventor Release 2023.2.3
 
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SoText3 Class Reference

3D text shape node. More...

#include <Inventor/nodes/SoText3.h>

+ Inheritance diagram for SoText3:

Public Types

enum  Justification {
  LEFT = 0x01 ,
  CENTER = 0x03 ,
  RIGHT = 0x02 ,
  INHERITED = 0x04
}
 Justification types. More...
 
enum  Part {
  FRONT = 0x01 ,
  SIDES = 0x02 ,
  BACK = 0x04 ,
  ALL = 0x07
}
 Text3 part values. More...
 
- Public Types inherited from SoShape
enum  ShapeType {
  POINTS ,
  LINES ,
  POLYGONS ,
  TEXT
}
 Basic type for antialiased rendering for this shape (Do not consider the SoDrawStyle property currently in the state). More...
 

Public Member Functions

virtual SoType getTypeId () const
 Returns the type identifier for this specific instance.
 
 SoText3 ()
 Creates a 3D text node with default settings.
 
- Public Member Functions inherited from SoShape
virtual SbBool affectsState () const
 Overrides default method on SoNode.
 
ShapeType getShapeType ()
 Gets the current shape Full Scene Antialiasing type.
 
- Public Member Functions inherited from SoNode
virtual void setOverride (const SbBool state)
 Turns the override flag on or off.
 
virtual SbBool isOverride () const
 Returns the state of the override flag.
 
virtual SoNodecopy (SbBool copyConnections=FALSE) const
 Creates and returns an exact copy of the node.
 
virtual void touch ()
 Marks an instance as modified, simulating a change to it.
 
- Public Member Functions inherited from SoFieldContainer
void setToDefaults ()
 Sets all fields in this object to their default values.
 
SbBool hasDefaultValues () const
 Returns TRUE if all of the object's fields have their default values.
 
SbBool fieldsAreEqual (const SoFieldContainer *fc) const
 Returns TRUE if this object's fields are exactly equal to fc's fields.
 
void copyFieldValues (const SoFieldContainer *fc, SbBool copyConnections=FALSE)
 Copies the contents of fc's fields into this object's fields.
 
SoNONUNICODE SbBool set (const char *fieldDataString)
 Sets one or more fields in this object to the values specified in the given string, which should be a string in the Open Inventor file format.
 
SbBool set (const SbString &fieldDataString)
 Sets one or more fields in this object to the values specified in the given string, which should be a string in the Open Inventor file format.
 
void get (SbString &fieldDataString)
 Returns the values of the fields of this object in the Open Inventor ASCII file format in the given string.
 
virtual int getFields (SoFieldList &list) const
 Appends references to all of this object's fields to resultList, and returns the number of fields appended.
 
virtual int getAllFields (SoFieldList &list) const
 Returns a list of fields, including the eventIn's and eventOut's.
 
virtual SoFieldgetField (const SbName &fieldName) const
 Returns a the field of this object whose name is fieldName.
 
virtual SoFieldgetEventIn (const SbName &fieldName) const
 Returns a the eventIn with the given name.
 
virtual SoFieldgetEventOut (const SbName &fieldName) const
 Returns the eventOut with the given name.
 
SbBool getFieldName (const SoField *field, SbName &fieldName) const
 Returns the name of the given field in the fieldName argument.
 
SbBool enableNotify (SbBool flag)
 Notification at this Field Container is enabled (if flag == TRUE) or disabled (if flag == FALSE).
 
SbBool isNotifyEnabled () const
 Notification is the process of telling interested objects that this object has changed.
 
virtual void setUserData (void *data)
 Sets application data.
 
void * getUserData (void) const
 Gets user application data.
 
- Public Member Functions inherited from SoBase
virtual SbName getName () const
 Returns the name of an instance.
 
virtual void setName (const SbName &name)
 Sets the name of an instance.
 
void setSynchronizable (const bool b)
 Sets this to be a ScaleViz synchronizable object.
 
bool isSynchronizable () const
 Gets the ScaleViz synchronizable state of this object.
 
- Public Member Functions inherited from SoRefCounter
void ref () const
 Adds a reference to an instance.
 
void unref () const
 Removes a reference from an instance.
 
void unrefNoDelete () const
 unrefNoDelete() should be called when it is desired to decrement the reference count, but not delete the instance if this brings the reference count to zero.
 
int getRefCount () const
 Returns current reference count.
 
void lock () const
 lock this instance.
 
void unlock () const
 unlock this instance.
 
- Public Member Functions inherited from SoTypedObject
SbBool isOfType (const SoType &type) const
 Returns TRUE if this object is of the type specified in type or is derived from that type.
 
template<typename TypedObjectClass >
SbBool isOfType () const
 Returns TRUE if this object is of the type of class TypedObjectClass or is derived from that class.
 

Static Public Member Functions

static SoType getClassTypeId ()
 Returns the type identifier for this class.
 
- Static Public Member Functions inherited from SoShape
static SoType getClassTypeId ()
 Returns the type identifier for this class.
 
static SbBool isPrimitiveRestartAvailable (SoState *state=NULL)
 Returns TRUE if the primitive restart feature is available.
 
- Static Public Member Functions inherited from SoNode
static SoType getClassTypeId ()
 Returns the type identifier for this class.
 
static SoNodegetByName (const SbName &name)
 A node's name can be set using SoBase::setName().
 
static int getByName (const SbName &name, SoNodeList &list)
 A node's name can be set using SoBase::setName().
 
- Static Public Member Functions inherited from SoFieldContainer
static SoType getClassTypeId ()
 Returns the type of this class.
 
- Static Public Member Functions inherited from SoBase
static SoType getClassTypeId ()
 Returns type identifier for this class.
 
- Static Public Member Functions inherited from SoTypedObject
static SoType getClassTypeId ()
 Returns the type identifier for this class.
 

Public Attributes

SoMFString string
 The text string(s) to display.
 
SoSFFloat spacing
 Defines the distance (in the negative y direction) between the base points of successive strings, measured with respect to the current font height.
 
SoSFBitMask parts
 Which parts of text are visible.
 
SoSFEnum justification
 Indicates placement and alignment of strings.
 
- Public Attributes inherited from SoShape
SoSFBool boundingBoxIgnoring
 Whether to ignore this node during bounding box traversal.
 

Friends

class SoAnnoText3
 
class SoAsciiText
 

Detailed Description

3D text shape node.

This node defines one or more strings of 3D text. In contrast with SoText2, 3D text can be rotated, scaled, lighted, and textured like all other 3D shapes.

Optionally (setting the parts field) each character in a 3D text string may be a true three dimensional object. This shape is created by extruding an outlined version of the character (in the current typeface) along the current profile, as defined by nodes derived from SoProfile. The default text profile, if none is specified, is a straight line segment one unit long.

The text position is always at the local origin (0,0,0). A transform node, e.g. SoTranslation, must be used to position the text in 3D space.

The text is always rendered in its local XY plane. A transform node, e.g. SoRotation, may be used to rotate the text plane in 3D space.

Text supports both single byte Latin1 (ISO8859-1) characters and multi-byte UNICODE characters. ISO8859-1 is an 8-bit character set which is a superset of the older 7-bit ASCII character set. See the SbString class for more information.

Rendering:

The typeface and size (default = 10) are specified using an SoFont node. The scale factor, if any, in the current transform is applied to this size.

3D text characters may be rendered using lines, polygons or textured rectangles depending on settings in the SoFont node. Textured rendering is recommended. It generally has the best performance (minimum geometry) and the best image quality (because antialiasing is applied).

  • Line rendering is selected by specifying a "stroke font" name in the SoFont name field. In this case line attributes apply instead of polygon attributes and text is not extruded.
  • Polygon rendering is selected by setting the SoFont renderStyle field to POLYGON (the default) or POLYGON_AND_OUTLINE.
  • Textured quad rendering is selected by setting the SoFont renderStyle field is set to TEXTURE or TEXTURE_DELAYED.

Rendering styles: Additional styles can be applied using an SoTextProperty node, including underline, strikethrough, background and background outline.

Complexity: The quality (degree of tesselation) of SoText3 line and polygon rendering depends on the SoComplexity node's value field. The quality of SoText3 textured rendering depends on the SoComplexity node's value and textureQuality fields, plus the SoTextProperty node's textureQualityRange field. If there is no SoComplexity the textureQuality is 1. See SoFont for more discussion.

Material: SoText3 uses the current set of materials when rendering but only OVERALL, PER_PART and PER_PART_INDEXED. Any other binding will behave like OVERALL. If the material binding is OVERALL, then the whole text is drawn with the first material. If it is PER_PART or PER_PART_INDEXED, the front part of the text is drawn with the first material, the sides with the second, and the back with the third.

Lighting: By default lighting is only computed for the "front" face of geometry, including SoText3, meaning that the back face of the text will be black when lighting is enabled. To illuminate both sides, enable "two sided" lighting using the SoShapeHints node's vertexOrdering field. But note that, unlike most geometry, you should set the vertexOrdering field to CLOCKWISE, not COUNTERCLOCKWISE.

Texture: Textures are applied to 3D text as follows. On the front and back faces of the text, the texture origin is at the base point of the first string; the base point is at the lower left for justification LEFT, at the lower right for RIGHT, and at the lower center for CENTER. The texture is scaled equally in both S and T dimensions, with the font height representing 1 unit. S increases to the right on the front faces and to the left on the back faces. On the sides, the texture is scaled the same as on the front and back. S is equal to 0 at the rear edge of the side faces. The T origin can occur anywhere along each character, depending on how that character's outline is defined.

Performance: A scene graph containing a large number of SoText3 nodes will generally have much better rendering performance using a text specific caching mechanism called accumulation rendering mode. However some features are not available and significant time may be required to build (or rebuild) this cache. See the SoTextProperty node enableTextAccumulation field for more information.

Justification:

Horizontal alignment of the text can be specified using the justification field. Both horizontal and vertical alignment can be controlled using an SoTextProperty node, however the justification setting in this node overrides the horizontal setting unless the justification field is set to INHERITED.

Picking:

Text can be picked (SoRayPickAction) like any other geometry. If a text node has been picked then SoPickedPoint can return an SoTextDetail object. This object contains information about which string (in a multi-string text node) was picked and which character within the string was picked.

Antialiasing:
Shape Antialiasing type is SoShape::TEXT.

FILE FORMAT/DEFAULT

    Text3 {
    string ""
    spacing 1
    justification LEFT
    parts FRONT
    }

ACTION BEHAVIOR

    SoGLRenderAction
    Draws text based on the current font, profiles, transformation, drawing style, material, texture, complexity, and so on.

    SoRayPickAction
    Performs a pick on the text. The string index and character position are available from the SoTextDetail.

    SoGetBoundingBoxAction
    Computes the bounding box that encloses the text.

    SoCallbackAction
    For non-stroke fonts,if any triangle callbacks are registered with the action, they will be invoked for each successive triangle used to approximate the text geometry.

    For stroke fonts, if any line segment callbacks are registered with the action, they will be invoked for each successive line segment used to approximate the text geometry.

SEE ALSO

SoComplexity, SoFont, SoFullSceneAntialiasing, SoProfile, SoText2, SoTextDetail, SoTextProperty

Definition at line 204 of file SoText3.h.

Member Enumeration Documentation

◆ Justification

Justification types.

Enumerator
LEFT 

Left edges of all strings are aligned.

CENTER 

Centers of all strings are aligned.

RIGHT 

Right edges of all strings are aligned.

INHERITED 

The text justification is inherited from the current SoTextProperty::alignmentH value.

Definition at line 212 of file SoText3.h.

◆ Part

Text3 part values.

Enumerator
FRONT 

Front faces of characters.

SIDES 

Extruded sides of characters.

BACK 

Back faces of characters.

ALL 

All parts.

Definition at line 232 of file SoText3.h.

Constructor & Destructor Documentation

◆ SoText3()

SoText3::SoText3 ( )

Creates a 3D text node with default settings.

Member Function Documentation

◆ getClassTypeId()

static SoType SoText3::getClassTypeId ( )
static

Returns the type identifier for this class.


◆ getTypeId()

virtual SoType SoText3::getTypeId ( ) const
virtual

Returns the type identifier for this specific instance.

Reimplemented from SoShape.

Friends And Related Symbol Documentation

◆ SoAnnoText3

friend class SoAnnoText3
friend

Definition at line 347 of file SoText3.h.

◆ SoAsciiText

friend class SoAsciiText
friend

Definition at line 348 of file SoText3.h.

Member Data Documentation

◆ justification

SoSFEnum SoText3::justification

Indicates placement and alignment of strings.

With LEFT justification, the left edge of the first line is at the (transformed) origin, and all left edges are aligned. RIGHT justification is similar. CENTER justification places the center of the first string at the (transformed) origin, with the centers of all remaining strings aligned under it. Use enum Justification. Default is LEFT.

Definition at line 281 of file SoText3.h.

◆ parts

SoSFBitMask SoText3::parts

Which parts of text are visible.

Note that, for speed, the default for this field is FRONT only.

Definition at line 271 of file SoText3.h.

◆ spacing

SoSFFloat SoText3::spacing

Defines the distance (in the negative y direction) between the base points of successive strings, measured with respect to the current font height.

A value of 1 indicates single spacing, a value of 2 indicates double spacing, and so on.

Definition at line 264 of file SoText3.h.

◆ string

SoMFString SoText3::string

The text string(s) to display.

Each string will appear on its own line.

Definition at line 256 of file SoText3.h.


The documentation for this class was generated from the following file: